- Design concept : Knight series- for iPhone 4/4S- Eco friendly material, made by German Bayer None toxic PC- Texture Options: Zebra, Leopard, Feather, Tiger- Flexible and durable, even 70 degree twisted, the cse can still return to its original position without twisting shape.- Rubber surface treated, give the cases delicate feel. - All printing ink has been strictly tested and selected. - UV resistant.- Alcohol resistant, passed 500 times tests with alcohol over the surface without cracking and loss its color. - Anti-slip, scratch and dust.- Translucent spray, enchance the visual effect of the shape and line for iPhone and show it perfectly.